I have my car serviced a few months ago (1998 BMW 323isa) when i bought it, by a mechanic (who does know bmws very well) and after he put new brakes on the car, when i picked the car up the abs light and asc lights on the dash were on, i didnt have time to leave it there again for x amount of days, so i just stuck with it. What could be causing this problem, i assume the ASC light/error is on because of the ABS? ASC needs ABS in order to work? Might it just be an ABS sensor or something that needs to be reset?

Under the hood, near the steering wheel there is a plug that sits close to the brake fluid resovior, make sure that plug is clean and tightly plugged in. The plug slides into place vertically, not horrizontally so make sure you're messing with the right plug. I'll post a pic if you need more help

thats so funny, mine is having the same problem, i was about to post this issue.. .anyone wanna help? it comes on after i switch gears, somwhere near the middle of my rides. usually somwhere between 3rd to 2nd.

Maybe this is your/our problem. You may have to copy and paste the URL to your goto bar at the top. http://www.freewebs.com/madmedia/thing.jpg
Still need suggestions/ideas incase this doesn't solve the problem. I am reseating the fuse right now.. results later tonight.